Single-acting quick-return pump.



A. A BOWSER.

SINGLE ACTING QUICK RETURN PUMP.

APPLICATION flLkl) IAN-16.1915.

Patented Apr. 2, 1918.

4 $HEETS-SHEET I.

A. A. BOWSER.

SINGLE ACTING QUICK RETURN PU MP. APPLICATION HLED JAN. l6. l9l5.

1,261,479. Patented Apr. 2,1918.

4 SHEETS-SHEET 2.

A. A. BOWSER.

SINGLE ACTING QUICK RETURN PUMP.

APPLICAIION mu) JAN. 16. 1915.

l ,26 1 ,47 9. Patented Apr. 2, 1918.

4 SHEETS-SHEET 3- A. A. BOWSER.

SINGLE ACTING QUICK RETURN PUMP.

AF'lLlUAllON HLED JAN. l6. l9l5.

ALLEN A. BOV/SER, 0F FORT WAYNE, INDIANA.

I SINGLE-ACTING QUICK-RETURN PUMP.

Specification of Letters Patent.

Patented Apr. 2, 1918.

Application filed January 16, 1915. Serial No. 2,509.

T 0 all whom it may concern:

Be it known that I, ALLEN A. P-owsnn, a citizen of the United States,residing at Fort IVayne, in the county of Allen and State of Indiana,have invented certain new and useful Improvements in Single-ActingQuick-Return Pumps, of which the following is a specification.

My invention relates to a quick return pump and has for its primaryobject the provision of improved mechanism whereby power applied to arotatable element or handle of the pump at any given speed may betransmitted to a second rotatable element to drive the second elementslowly in one direction and more rapidly in the reverse direction.

IVith the above and other objects in view, this invention consistssubstantially in the combination, arrangement, and construction of partsall as hereinafter described, shown in the accompanying drawings, whichforma part of this specification and illustrate the preferred embodimentof the invention, and more specifically set forth in the subjoinedclaims.

In the drawings, Figure 1 is a side elevation of a pump of the class towhich the present invention applies;

Fig. 2 is a top plan view of pump actuating mechanism constructed inaccordance with the principles of this invention, a portion of thecasing thereof being sectioned;

Fig. 3 is a section approximately on line 22 of Fig. 2;

Fig. 4 is a view similar to Fig. 3, showing a different position of theparts;

Fig. 5 is a section taken approximately on line 44 of Fig. 2 with aportion of a gear removed;

Fig. 6 is a section taken approximately on line 5-5 of Fig. 5;

Fig. 7 is a section taken approximately on line 6-6 of Fig. 6,'and

Fig. Sis a view similar to Fig. 7, showing a different position of theparts.

For the purpose of showing a practical application of my invention, Iillustrate and describe it as incorporated in the operating apparatus ofa reciprocating piston pump.

Preferably, the pump is of the single-acting type, but for the sake ofbrevity all parts of the pump proper are omitted except portions of thecasing, those portions of the operating apparatus necessary forunderstanding of the invention, and a vertically reciprocating rack soconnected with the piston of the pump that the two operatesynchronously. In this pump the load is carried during the upward strokeof the piston and, hence, it is desirable to elevate the pump piston bymeans of reducing gears and to return the pump piston by gearingrequiring less turns of the operating mechanism than are necessary inthe up-stroke.

It has been customary to return the pump piston on its idle stroke,.byrotating the operating handle in reverse direction at increased speed,but it is found, in practice, that people do not operate the handlereadily at faster speed in reverse direction. By operating the handle ofthis pump at the same speed in both directions, and having gearing whichreturns the pump piston more rapidly on its return stroke,-more completepower strokes can be made in the same time u ith less fatigue andconsequently the pump is operated with more eflicien'cy, and more liquidcan be dispensed in a given time than with the old construction.

Reference numeral 10 indicates the casing of a pump shown in elevationby Fig. 1, which is provided with a removable portion 10*. Thls pump hasa vertically reciprocable rack 11 connected with the pump piston 9 bymeans of the rod 8 with an inlet 7 at the bottom and an outlet 6 at thetop of the pump cylinder or casing. An idler shaft 12 is suitablyjournaled in the pump adjacent the rack and fixedly secured to thisshaft is a rack inion 13, meshing with the rack 11. An idler gear .14 ismounted upon the shaft 12 and adjacent the outer side of rack pinion 13,while an idler pinion 15 is like wise mounted upon the shaft 12,adjacent the inner side of rack pinion 13, a pin 16 parallel to shaft 12passes through pinion 13 and into gear 14 and idler pinion 15, therebylocking the latter members into fixed relation with the rack pinion 13and the idler shaft 12. Parallel and adjacent to the idler shaft 12 is apower shaft 17 operated by a crank or hand lever 5 (see Fig. 1) to whichis keyed a collar 18. Rotatably mounted upon the collar 18 is a powergear 19, meshing with idler pinion 15, and rotatably mounted upon theshaft 17 is a power pinion 2O meshing with idler gear 11. As best seenin Fig. 6, the inner side of power pinion 20 is provided with a sleeve21, which, with the pinion, is rotatable upon the shaft 17 and whichextends into the annular space formed between the power shaft 17 andcollar 18. A slot 22 is provided in the collar 18 and traverses thecollar in a plane approximately tangential to the inner peripherythereof. A preferably rectangular notch 23 is provided in the outerperiphery of the sleeve 21 in such position that at each revolution ofthe collar 18 the slot 22 and notch 23 may be brought into register. Asimilar notch 24 is provided in the inner periphery of power gear 19 insuch position that it, also, may be made to register with slot 22 byrotation of the collar 18. For the purpose of looking to collar 18 forrotation therewith either sleeve 21 or gear 19, sliding pawl 25 isslidably ]positioned within slot 22, the pawl being s aped at oppositecorners in conformity with the notches 23 and 24. For a purpose to bedescribed an offset extension 26 is pro vided upon the pawl. An annularflange 27 is formed upon the outer side of power gear 19 concentricallywith power shaft 17, and within the recess formed by. this flange ispositioned any suitable form of friction ring 28, provided on its innerside with a recess 29, adapted to receive the ofiset extension 26 ofpawl 25. Sufficient friction is provided for between the ring 28 and theflange 27 to cause a drag of the pawl 25 through slot 22 when power isapplied in either direction to shaft 17.

1n the operation of this invention, and considering the parts at rest,with pawl 25 positioned within the confines of slot 22, power is appliedto ower shaft 17 moving it in the counter clochwise direction indicatedby arrows in Figs. 1 and 7. Such movement of the power shaft gives riseto similar movement of collar 18, which in its movement carries with itpawl 25. By reason of the load the gearing carries, however, frictionring 28 exerts a drag upon the pawl, causing the pawl to enter notch 23when that notch registers with slot 22. When the pawl, which is ofsufficient siZe to engage both notch 23 and a portion of slot 22, is insuch position, the power of shaft 17 is communicated through collar 18and the pawl 25 to sleeve 21 and power pinion 20, and the pinion 20,being in mesh with the idler gear 1 1, causes rotation of the idlershaft 12 and consequent upward travel of the rack 11, as indicated bythe arrow upon the rack in Fig. 1. When it is desired to reciprocaterack 11, power is applied to shaft 17 in a reverse or clockwisedirection, indicated by curved arrows in Figs. 3 and 8. The drag of thefriction ring is now in the opposite direction from that just mentioned,causing a travel of pawl 25 through slot 22 and into engagement withnotch 21 and the other end of slot 22 when the slot and that notchregister. Upon such engagement the power of shaft 17 is communicatedthrough collar 18, pawl 25, and power gear 19 to idler pinion 15 andidler. shaft 12, causing downward movement of rack 11, as indicated bythe arrow upon the rack in Fig. 3. During the first described upwardmovement of the rack, power gear 19 was idled upon collar 18, and duringthe last mentioned downward movement of rack 11, power pinion 20 and itssleeve 21 were idled upon shaft 17 and within collar 18. Considering thepower as applied in a counter clockwise direction to shaft 17 and at agiven speed, it will be seen that the power passing through pinion 20and idler gear 14: reaches rack 11 through reducing gears, whileconversely, the application of power in a reverse direction to shaft 17and at the same speed, passing through power gear 19 and idler pinion15, is conveyed to the rack 11 through multiplying gears, therebyeffecting a more rapid downward travel of the rack.

With this construction, it is obvious that by simply rotating the handle5, at constant speed in both directions, the pump piston is moved slowlyon its working stroke and rapidly on its return or idle stroke.

1n the accompanying drawings and in the foregoing description, is setforth the preferred embodiment of my invention, but it is obvious thatone skilled in the art may make modifications thereof without departingfrom the spirit of the invention.

1 claim:

1. In a single acting pump, the combination with a pumping member, of anoperating mechanism therefor which includes a rotary driving member, andmeans dependent upon the direction of rotation of said driving member todrive the pumping memher more rapidly in one direction than in the otherwhile the speed of the operating mechanism is constant.

2. In a single acting pump, the combination with a pumping member, of anoperating mechanism therefor which includes a rotary driving member, andintermediate connections dependent upon the direction of rotation ofsaid driving member to drive the pumping member at difierent speeds in0pposite directions while the speed of the operating mechanisn: isconstant.

3. In a single acting pump, the combination with a pumping member, of anoperating mechanism which includes a rotary driving member, two sets ofgears of different sizes, and means dependent upon the direc tion ofrotation of said driving member to alternately connect these sets ofgears with the pumping member on the working and return strokes whilethe speed of the operating mechanism is constant.

4. In a single acting pump, the combination with a rotatable pumpdriving member, of a uniformly rotatable power element, a gearingconnection to drive the member from the element at a reduced speed inone direction, and another gearing connection to drive the element fromthe member at an increased speed in the other direction for the samespeed of operation of the said element, the said connections beingautomatically made dependent upon the direction of rotation of saidelement.

5. In a single acting pump, the combination with a rotatable pumpoperating member of a uniformly rotatable power element, reducing speeddriving means, increasing speed driving means, and means dependent uponthe direction of rotation of the element to connect either driving meansbetween the member and the element to rotate the member at-one speed inone direction of movement of the element and at a different speed in theother direction of movement.

6. In a single acting pump, the combination with a pump operating gearmember of a rotatable power element, reducing speed driving means,increasing speed driving means, and means dependent upon the directionof rotation of the element to connect the element with the memberthrough the reducing speed driving means in one direction and throughthe increasing speed driving means in the other direction.

7. The combination with a single acting pump, of a pump operating gearmember, of a rotatable power element, reducing speed driving means,increasing speed driving means, and means dependent upon the di rectionof rotation of the element to connect the element with the memberthrough the reducing speed driving means to rotate the member in onedirection and through the increasing speed driving means to rotate themember in the other direction.

8. In a single acting pump, the combination with a pump driving gearmember of a rotatable power element, reducing speed driving means,increasing speed driving means, and a single means dependent foroperation upon the direction of movement of the element to connect itthrough either one of the driving means to rotate the member in eitherdirection.

9. In a single acting pump, the combination with a rotatable pumpoperating gear member, of a rotatable power element, a

double train of gears, one increasing and one reducing, and meansdependent upon the direction of rotation of the element for connectingthe element to the member through either gear train for rotating themember slowly in one direction and rapidly in the other with the samespeed of rotation of the element.

10. The combination of a pump having a reciprocable driven member and arotatable handle, of a double driving connection be tween the member andthe handle dependent for operation upon the direction of rotation of thehandle to reduce the driving speed from the handle to move the memberslowly in one direction and to increase the driving speed to move themember rapidly in the other direction.

11. The combination of a pump having a reciprocable rack and a rotatablepower handle, of a double driving connection between the rack and thehandle dependent for operation upon the direction of rotation of thehandle and comprising a'pinion engaging the rack and a drivingconnection between the pinion and the handle for driving the pinion morerapidly than the handle in one direction of rotation and less rapidlythan the handle in the other direction of rotation.

12. The combination with a single acting pump having a reciprocabledriven member and a rotatable driving member, of a double drivingconnection between the reciprocable member and the rotatable memberdependent upon the rotation of the rotatable member for reducing thespeed from the rotatable member to the reciprocable member for drivingthe latter slowly upon its power stroke and for driving the reciprocablemember at a speed increased from the speed of the rotatable member whendriving the reciprocable member in the other direction.

13. A single acting pump having a reciprocable operating rack, a drivingpinion rotatable driving member, gears mounted thereon meshingrespectively with the other gears, and means comprising a driving pawldependent for operation upon the direction of notation of the rotatablemember for connecting either one of the gears mounted on the drivingmember with the driving member to rotate the pinion at a speed less thanthe speed of rotation of the driving member in one direction and at aspeed greater than the speed of rotation of the driving member in theother direction.

14. In a single acting pump, the combination with a rotatable pumpoperating gear member of a rotatable power element, a gearing connectionto drive the member from the element at a reduced speed in onedirection, another gearing connection to drive the element at anincreased speed in the other direction, and a driving pawl dependent foroperation upon the direction of rotation of the power element forplacing either gearing connection in operation.

15. In a single acting pump, the combination with a rotatable pumpoperating member, of a rotatable power element, a recessed collarsecured to the power element, a gear freely mounted on the collar havinga driving connection with the member to be rotated, a gear mounted onthe power element having a driving connection with the member to berotated, and a pawl movable in the recess of the collar to connecteither the gear on the collar or the gear on the power element with thepump operating member.

16. In a single acting pump, the combination with an operating gearmember therefor, of a rotatable power element, a slotted collar securedto the power element, a gear freely mounted on the collar having adriving connection with the member to be rotated, a gear mounted on thepower element having a drivin connection with the memher to be rotatetf,a pawl movable in the slot of the collar to connect either the gear onthe collar or the gear on the power element with the member to berotated, and means dependent upon the direction of rotation of the powerelement to move the pawl into either position.

17. ln a single acting pump, the combination with a rotatable operatinggear member, of a rotatable power element, a slotted collar secured tothe power element, a gear freely mounted on the collar having a drivingconnection with the member to be rotated, a gear mounted on the powerelement having a driving connection with the member to be rotated, aslidable pawl movable in the slot of the collar to connect either thegear on the collar or the gear on the power element with the member tobe rotated, and a fr1ction ring adapted to engage the pawl for moving itin either position and dependent for movement upon the direction ofrotation of the power element.

18. In a single acting pump, the combination with a pump operatingshaft, of a r0- tatable power shaft parallel thereto, a collar fixedupon the power shaft having a driving connection with the operatingshaft and having a slot extending tangentially of its inner periphery, apower gear journaled upon the collar, having a driving connection withthe operating shaft, a power pinion journaled upon the power shaft, anextension upon the power pinion positioned with the collar, a pawlmovable in the slot of the collar, the inner periphery of said powergear and the outer periphery of said exten sion each bearing a notchregistrable with the slot of the collar, and means for moving the pawlinto simultaneous engagement with the slot and the extension notchduring rotation of the power shaft in one direction and for positioningthe pawl in simultaneous engagement with the slot and the notch of thepower gear during rotation of the power shaft in the reverse direction.

19. In a single acting pump, the combination with a pump operatingshaft, of a rota table power shaft parallel thereto. a collar fixed uponthe power shaft having a driving connection with the operating. shaft,and having a slot extending tangentially of its inner periphery,'a powergear journaled upon the collar having a driving connection with theoperating shaft, a power pinionjournaled upon the power shaft, anextension uponthe power pinion positioned within the collar, a pawlmovable in'the slot of the collar, the inner periphery of said powergear and the outer periphery of said extension each bearing a notchregistrabl'e with the slot of the collar, and means for moving the pawlinto simultaneous engagement with the slot and the extension notchduring rotation of the power shaft in one direction and for positioningthe pawl in simultaneous engagement with the slot and the notch of thepower gear during rotation of the power shaft in the reverse direction,comprising an annular flange concentric with the power shaft and formedupon the side of the power gear, an offset extension upon the pawl, anda friction ring recessed for engagement of said ofiset pawl extensionand yieldingly carried within said flange.

20. In a single actin pump, the combination with a reciproca 1e rack, ofan idler shaft rotatably journaled adjacent thereto, a rack pinion fixedupon the shaft and meshing with the rack, an idler gear fixed to theidler shaft at one side of the rack pinion, an idler, an idler pinionfixed to the idler shaft at the oppositerside of the rack pinion, arotatable power shaft parallel to the idler shaft, a collar fixed uponthe power shaft and having a slot extending tangentially of its innerperiphery, a power gear journaled upon the collar and meshing with theidler pinion, a power pinion journaled upon the power shaft and mesh ingwith the idler gear, an extension upon the power pinion positionedwithin the collar, a pawl slidable in the slot of the collar, the innerperiphery of said gear and the outer periphery of said extension bearingeach a notch registrable with the slot of the collar, an annular flangeconcentric with the power shaft and formed upon the side of the powergear, an offset extension upon the pawl, and a friction ring recessedfor engagement by said offset pawl extension and yieldingly carriedwithin said flange.

21. ltn a single acting pump, the combination with a reciprocatingmember, of a driving gear member, a rotatable power element, reducingspeed driving means, increasing speed driving means, and a singlemechanism dependent upon the direction of movement of the rotatablepower element to 5 connect it through either one of the driving means torotate the member in either direction but at different speeds.

22. In a single acting pump, the combination with a reciprocatingmember, of

a driving gear meshing therewith, relatively small and large gears inconnection with the driving gear, a rotatable driving member gearsmounted thereon meshing respectively before mentioned and respectivelyreversed in their comparative size with reference to such small andlarge gears, and mechanism dependent for operation upon the direction ofrotation of the rotatable member for connecting either one of the gearsmounted on the driving member with its appropriate gear connected to thedriving gear to rotate said gear at a speed less than the speed ofrotation of the driving member in one direction and at a speed greaterthan the speed of rotation of the driving member in the other direction.4

23. In a single acting pump, the combination .with a reciprocatingmember, of a driving gear meshing therewith, a rotatable power element,a gearing connected to drive the driving gear from the power element ata reduced speed in one direction, another gear connected to drive suchdriving gear from the power element at an increased speed in the otherdirection, and a shifting connection operated by the direction ofrotation of the power element for placing either gearing connection indriving relation whereby the reciprocating element may be operated atdifferent speeds by reverse rotations of the rotatable driving member.

24. In a single acting pump, the combination with a reciprocatingmember, of

a driving member connected to and operating the same, a power element,intermediate connections between the power element and the drivingmember comprising two sets of gears respectively of increasing and de-60 creasing speed ratios, and means controlled by the direction ofmovement of the power element.for alternately connecting the drivinggear with these gearing connections of different ratios whereby thespeed of the reciprocating member is varied accordingly in its oppositedirections of movement.

25. In a single acting pump, the combination with a reciprocatingmember, of a driving member connected therewith, a

rotatable power element, two sets of connections between the powerelement and the driving member of different ratios, and shifting meansoperated from the rotatable power member in diiTerent directions of 66rotation of the latter to respectively shift with the small and largegears the intermediate connections of different ratios into engagementwith the driving member, whereby the reciprocating member is operated atdifferent speeds in different directions of movement of the rotating 70power element.

26. A pump, comprising a reciprocating piston, an actuator, transmissiongearing whereby said actuator will operate the piston in one directionto deliver liquid from the pump, and a separate transmission gearingunder control of the actuator for operating the piston in the oppositedirection to its starting point.

27 In a pump, the combination with a reciprocating piston, transmissiongearing for operating the piston in one direction to deliver liquid fromthe pump, and an actuating device for actuating said transmissiongearing, of transmission gearing for actuating said piston in theopposite direction to its starting point, and a clutch device acting todrive said last named gearing in moving the piston to its startingpoint.

28. In a pump, the combination with a reciprocating piston, a rack forreciprocating said piston, a pinion meshing with said rack, transmissiongearing for drivin said pinion in one direction and independentlyoperable transmission gearing for driving said pinion in the oppositedirection.

29. In a pump, the combination of a reciprocating piston, a rack forreciprocating said piston, a pinion meshing with said rack, variablespeed transmission'gear mechanism for driving said pinion in oppositedirections to reciprocate said piston, and an actuator controlling saidgearlng'.

30. In a pump, the combination with a cylinder, a piston mounted toreciprocate therein, a train of gearing, for operating said plston,comprising a. clutch member adapted to be manually rotated, a pinionadapted to be driven by said clutch member,

a gear meshing with said pinion, gear oonnections between said gear andsaid piston, and means for locking said clutch device with said pinionwhen rotated in one direction and to release said clutch device fromsaid pinion when rotated in the opposite direction, substantially asspecified.

31. In a pump, the combination with a cylinder, a piston adapted toreciprocate t erein, a piston rod and a rack connected to said rod, of apinion meshing with said rack, a train of gearing operable to rotatesaid pinion in one direction to operate said rack and thereby saidpiston to deliver fluid from said pump, an independently operable gearfor driving said pinion in the opposite direction to restore said pistonto its starting point, and a single actuator for driving said train ofgearing and said last-named gear.

32. The combination with a member to be rotated, of a rotatable powerelement, In testimony whereof I have signed my 10 -means to connect themember and, the elename to this specification, in the presence ment forrotation in one direction, and a of two subscribing witnesses, on this13th gearing connection between thebmember gnfd day of January A. D.1915.

a the element to rotate the mem er at a i T ferent speed in the otherdirection, when ALLEB BOWSER' the direction of rotation of the elementis Witnesses: changed and when the speed of the element J R. MATLAOK,remains constant. Q. J. ROHLMAN.

